Immune System

3. Name for the virus that causes AIDS
6. ___ shock: severe reaction to an allergen; may result in death
9. Weakened or dead form of a disease
11. Any substance the body cannot recognize
12. When a disease affects an unusual number of people in a region at the same time
13. Infection of the immune system caused by HIV
15. When a disease is prevalent throughout the world
17. Swelling and redness at the site of an infection
19. When a disease is at a constant, “normal” occurrence
21. ____ contact: being near an infected person who sneezes without covering their mouth
23. Sweat and oil on your skin are slightly _____, preventing some pathogens from growing
24. ____Line of defence; includes skin and the linings of body systems

1. Unusually high sensitivity to some substance
2. Immune response that is quick, general and non-specific
3. Chemical the body releases to fight invaders such as allergens
4. Process of receiving a vaccine
5. White blood cells that search for invader cells and swallows them
7. Drug used to treat allergies
8. ____ T cells: activate in the presence of antigens and signal B cells to make antibodies
10. The severity of a disease caused by a virus
14. Any substance that causes an allergic reaction
16. Disease-causing invader, or “germ”
18. ____ T cells: destroy the body’s own cells that are infected by viruses, bacteria, or cancer
20. ____ contact: shaking hands, or sharing drinking containers
22. Cells that produce antibodies